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首页> 外文期刊>The European Journal of Neuroscience >Spontaneous local alpha oscillations predict motion-induced blindness
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Spontaneous local alpha oscillations predict motion-induced blindness

机译:自发的局部阿尔法振动预测运动引起的失明

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摘要

Bistable visual illusions are well suited for exploring the neuronal states of the brain underlying changes in perception. In this study, we investigated oscillatory activity associated with motion-induced blindness' (MIB), which denotes the perceptual disappearance of salient target stimuli when a moving pattern is superimposed on them (Bonneh etal., ). We applied an MIB paradigm in which illusory target disappearances would occur independently in the left and right hemifields. Both illusory and real target disappearance were followed by an alpha lateralization with weaker contralateral than ipsilateral alpha activity (similar to 10Hz). However, only the illusion showed early alpha lateralization in the opposite direction, which preceded the alpha effect present for both conditions and coincided with the estimated onset of the illusion. The duration of the illusory disappearance was further predicted by the magnitude of this early lateralization when considered over subjects. In the gamma band (60-80Hz), we found an increase in activity contralateral relative to ipsilateral only after a real disappearance. Whereas early alpha activity was predictive of onset and length of the illusory percept, gamma activity showed no modulation in relation to the illusion. Our study demonstrates that the spontaneous changes in visual alpha activity have perceptual consequences.
机译:双稳态视觉错觉非常适合探索潜在知觉变化的大脑神经元状态。在这项研究中,我们研究了与运动诱发的失明相关的振荡活动(MIB),当活动模式叠加在其上时,这表示显着目标刺激的知觉消失(Bonneh等人,)。我们应用了MIB范式,其中虚幻的目标消失将在左半场和右半场独立发生。虚幻的和真实的目标消失都伴随着阿尔法侧向化,其对侧比同侧阿尔法活动弱(类似于10Hz)。但是,只有错觉在相反的方向上显示了早期的alpha侧向化,这早于两种情况下出现的alpha效应,并且与估计的错觉的发生相吻合。当考虑到受试者时,这种早期侧向化的程度进一步预测了幻觉消失的持续时间。在伽玛带(60-80Hz)中,我们发现对侧活动仅在真正消失后才相对于同侧增加。早期的α活性可预测幻觉的发作和长度,而γ活性与幻觉无关。我们的研究表明,视觉阿尔法活动的自发变化具有知觉后果。

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